linuxaudio.org

On 06/09/2012 09:20 PM, Atte André Jensen wrote:

quoted text
> On 2012-06-09 07:22, David Adler wrote:

>

>> Maybe recompile jack2 with -O0 (instead of -O2, the default from

>> /etc/makepkg.conf). Just a guess, but that cured similar hiccups over

>> here.

>> There is an issue with g++ 4.7.0/jack2, it's currently being discussed

>> on Jack-Devel/LAU in the thread titled "jack2 turned verbose".

Most of the discussion has moved to jack-devel. It was too technical and

OT for LAU.
> Building from aur fails with:

quoted text
>

> /usr/lib/gcc/i686-pc-linux-gnu/4.7.0/../../../libm.so: could not read

> symbols: Invalid operation

> collect2: error: ld returned 1 exit status

> Waf: Leaving directory

> `/tmp/yaourt-tmp-atte/aur-jack2-git/src/jack2-git-build/build'

> Build failed

>  -> task in 'jack_midi_latency_test' failed (exit status 1):

>     {task 165000684: cprogram midi_latency_test.c.5.o ->

> jack_midi_latency_test}

> ['/usr/bin/gcc', '-Wl,-O1,--sort-common,--as-needed,-z,relro',

> '-Wl,-O1,--sort-common,--as-needed,-z,relro', '-lm', '-lstdc++', '-lm',

> 'example-clients/midi_latency_test.c.5.o', '-o',

> '/tmp/yaourt-tmp-atte/aur-jack2-git/src/jack2-git-build/build/example-clients/jack_midi_latency_test',

> '-Wl,-Bstatic', '-Wl,-Bdynamic', '-Lcommon', '-ljack', '-lpthread',

> '-lcelt0', '-lrt', '-ldl']

> ==> ERROR: A failure occurred in build().

>     Aborting...

> ==> ERROR: Makepkg was unable to build jack2-git.

You still use -O1 -- That won't work with gcc-4.7.0 and jack2 due to a

gcc-bug [most likely] (see jack-devel -

http://permalink.gmane.org/gmane.comp.audio.jackit/26057 ) -- use -O0 as

David suggested or better: gcc-4.6 that may also work-around the libm

issue, as well.
As for libm: Maybe one of the following can shed some light.
ls -l /usr/lib/gcc/i686-pc-linux-gnu/4.7.0/../../../libm.so

ls -l /usr/lib/libm.so

file /usr/lib/libm.so
It's also mentioned twice: '-lm', '-lstdc++', '-lm' but that should not

make a difference.
ciao,

robin

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